1、BRITISH STANDARD AEROSPACE SERIES BSEN 2070-4:1991 Specification for Aluminium and aluminium alloy wrought products Technical specification Part4: Tube for structures This European Standard EN2070-4:1989 has the status of a British Standard UDC669.71.018.26-46:620.1:629.7BSEN2070-4:1991 This British
2、 Standard was published under the authority ofthe Board of BSI and comes into effect on 31 January1991 BSI11-1999 The following BSI references relate to the work on this standard: Committee reference ACE/61 Draft for comment88/72194DC ISBN 0 580 19077 3 Cooperating organizations The European Committ
3、ee for Standardization, under whose supervision this European Standard was prepared, comprises the national standards organizations of the following Western European countries. Austria Oesterreichisches Normungsinstitut Belgium Institut belge de normalisation Denmark Dansk Standardiseringsraad Finla
4、nd Suomen Standardisoimisliito, r.y. France Association franaise de normalisation Germany Deutsches Institut fr Normung e.V. Greece Hellenic Organization for Standardization Iceland Technological Institute of Iceland Ireland National Standards Authority of Ireland Italy Ente Nazionale Italiano di Un
5、ificazione Luxemburg Inspection du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portugus da Qualidade Spain Asociacin Espaola de Normalizacin y Certificacin Sweden Standardiseringskommissionen i Sverige Switzerland Associ
6、ation suisse de normalisation United Kingdom British Standards Institution Amendments issued since publication Amd. No. Date of issue CommentsBSEN2070-4:1991 BSI 11-1999 i Contents Page Cooperating organizations Inside front cover National foreword ii Brief history 2 Text of EN2070-4 3 National appe
7、ndix A Inside back cover National appendix B Inside back coverBSEN2070-4:1991 ii BSI 11-1999 National foreword This British Standard has been prepared under the direction of the Aerospace Standards Policy Committee and is the English language version of EN2070 “Aerospace series. Aluminium and alumin
8、ium alloy wrought products. Technical specification”. Part4: “Tube for structures”, published by the European Committee for Standardization (CEN). EN2070-4 was produced as a result of international discussion in which the UK took an active part. A British Standard does not purport to include all the
9、 necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, th
10、eEN title page, pages2 to6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN2070-4 December
11、1989 UDC: 669.71.018.26-46:620.1:629.7 Key words: Aircraft industry, rolled products, semi-finished products, aluminium, aluminium alloys, metal tubes, manufacturing, specifications English version Aerospace series Aluminium and aluminium alloy wroughtproducts Technical specification Part4: Tube for
12、 structures Srie arospatiale Demi-produits corroys en aluminium et alliages daluminium Spcification technique Partie4: Tubes pour application structurale Luft- und Raumfahrt Halbzeug aus Aluminium und Aluminium-Knetlegierungen Technische Lieferbedingungen Teil4: Konstruktionsrohre This European Stan
13、dard was accepted by CEN on1988-07-20. CEN members are bound to comply with the requirements of CEN Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerni
14、ng such national standards may be obtained on application to the CEN Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own
15、 language and notified to CEN Central Secretariat has the same status as the official versions. CEN members are the national standards organizations of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxemburg, Netherlands, Norway, Portugal, Spain, Sweden, Switz
16、erland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels CEN1989 Copyright reserved to all CEN members Ref. No. EN2070-4:1989EEN2070-4:1989 2 BSI 11-1999 Brief history
17、This European Standard has been prepared by the European Association of Aerospace Manufacturers (AECMA). After inquiries and votes carried out in accordance with the rules of this Association, this Standard has successively received the approval of the National Associations and the Official Services
18、 of the membercountries of AECMA, prior to its presentation to CEN. According to the Common CEN/CENELEC Rules, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxemburg, Netherlands, Norway,
19、Portugal, Spain, Sweden, Switzerland and UnitedKingdom. Contents Page Brief history 2 1 Scope and field of application 3 2 References 3 3 Manufacture 3 4 Batch 3 5 Dimensions 3 6 External defects 3 7 Tensile test 4 8 Batch uniformity 4 9 Flattening test 4 10 Drift test 4 11 Coarse grain zone 4 12 Sp
20、ecial tests 4 13 Marking 4 Table 1 3 Table 2 3 Table 3 5 Table 4 Summary of requirements for tube for structures 6EN2070-4:1989 BSI 11-1999 3 1 Scope and field of application The present standard specifies the particular requirements of tubes for structures in aluminium or aluminium alloys, obtained
21、 by extrusion or extrusion and drawing. This standard shall be used in conjunction with EN2070-1. 2 References EN2002-1, Aerospace series Test methods for metallic materials Part1 Tensile testing at ambient temperature 1) . EN2002-7, Aerospace series Test methods for metallic materials Part7 Hardnes
22、s test 1) . EN2002-9, Aerospace series Test methods for metallic materials Part9 Tube drift expanding test 1) . EN2002-10, Aerospace series Test methods for metallic materials Part10 Tube flattening test 1) . EN2002-16, Aerospace series Test methods for metallic materials Part16 Dye penetrant testin
23、g 1) . EN2070-1, Aerospace series Aluminium and aluminium alloy wrought products Technical specification Part1 General requirements. 3 Manufacture Unless otherwise specified, the method of manufacture to be employed shall be at the discretion of the manufacturer, however, the following requirements
24、shall be observed: The use of bridge die process or die quenching is only permissible when agreed in writing between the manufacturer and purchaser. 4 Batch 4.1 Batch definition Batch definition shall conform to EN2070-1 except that aggregation of casts is not permitted. 4.2 Batch size The maximum s
25、ize of the batch, proportional to the tube mass per metre is shown in Table 1. Table 1 5 Dimensions Dimensions and tolerances shall conform to the relevant semi-finished product standard or drawing. The frequency of examination adopted by the manufacturer shall be sufficient to permit him to certify
26、 compliance with the requirements. 6 External defects Unless otherwise required on the order or the inspection schedule, the condition of the internal and external surfaces of the tubes shall conform with Table 2 and be determined by visual examination. Dye penetrant testing may be applied in accord
27、ance with EN2002-16, to verify the extent or existence of surface defects. The frequency of examination adopted by the manufacturer shall be sufficient to permit him to certify compliance with the requirements of Table 2. Table 2 1) In preparation Mass per metre: r(kg/m) u 0,25 0,251 Size of the bat
28、ch (kg) u 250 u 500 u 1000 Type of defect Acceptance criteria Score marks a Allowable if defect depthu 3% of a cand u 0,3mm Die pick-up aSmears a Superficial corrosion a Minor defects not impeding product use are allowed Embedded particles a Not allowed after dressing Handling damage a Allowed if de
29、pthu3% of a candu 0,3mm Blisters bCracks b Extrusion stoppage and resumption marks b Rejected a Dressing allowed provided dimensions remain within tolerances, surface appearance of the dressed zones shall be similar to that of the rest of the material. b Dressing is not allowed. c a=nominal thicknes
30、s.EN2070-4:1989 4 BSI 11-1999 7 Tensile test Tensile tests shall conform with EN2002-1. The number of tests per batch is specified in Table 4. The total number of tests and the selection of tubes depend upon the method used for batch uniformity (seeclause8). The test results shall meet the requireme
31、nts of the material standard. 8 Batch uniformity Batch uniformity of material delivered in the T. . . 2)condition shall be demonstrated by one of the two following methodsa) orb). The method used shall be at the discretion of the manufacturer unless otherwise specified by the purchaser. a) Tensile t
32、est carried out on each end of each selected tube. A minimum of two tubes shall be selected at random from each batch, these four tensile tests include those required by clause7. All tests shall meet the requirements of the material standard. b) By hardness testing each end of each tube over20mm in
33、diameter in accordance with EN2002-7. The values obtained shall conform to the requirements of the material standard. The tube of lowest hardness shall be selected for tensile testing in accordance with clause7. 9 Flattening test If required by the material standard a flattening test shall be carrie
34、d out in the condition of supply in accordance to EN2002-10. The frequency of tests is specified in Table 4. Retesting procedure for flattening test shall be asEN2070-1, for tensile test. 10 Drift test For circular tubes, if agreement has been obtained to manufacture the tubes by the bridge die proc
35、ess, one end of each extruded length shall be drift tested in accordance with EN2002-9. The mandrel angle shall be(74 1) . Testing shall continue until fracture occurs. Fracture shall be of the shear type mode i.e.at45 to the radius; fracture along the radius shall be cause for rejection. 11 Coarse
36、grain zone Where specified on the order or in the inspection schedule, tubes shall be macrographically examined with respect to coarse grain zone. The “capability clause” may be applied to this requirement. 12 Special tests Special tests and inspection may be required by the purchaser (e.g.: interna
37、l stress, electrical conductivity, intergranular corrosion, micrographic structure, . . .). In such cases, after agreement between purchaser and manufacturer, nature of test, methods, number and acceptance standards shall be specified on the order or in the inspection schedule. 13 Marking Marking sh
38、all be in accordance with EN2070-1. If special tests in accordance with clause12 are required the marking shall be defined and shall reflect these extra requirements. The frequency of examination adopted by the manufacturer shall be sufficient to permit him to certify compliance with the requirement
39、s. 13.1 Unless otherwise agreed between manufacturer and purchaser and specified on the order or in the inspection schedule, the position of the marking for tubes whose diameter or greatest transverse dimensions is equal to or greater than16mm shall be in accordance with Table 3. 13.2 For tubes with
40、 a diameter or largest transverse dimension of less than16mm the marking shall be on a durable label attached to each bundle of products. 2) “Aluminium Association” designationEN2070-4:1989 BSI 11-1999 5 Table 3 Continuous marking a End marking b Material standard Dimensional standard Delivery condi
41、tion Batch number c Manufacturer and plant identification Batch number b Inspection stamp a Ink (or similar product) shall be used. All indications shall be repeated each0,5mmax. b Marked on one end of the product. c Unless otherwise specified on the order the batch number shall be marked either by
42、continuous or end marking at the option of the manufacturer.EN 2070-4:1989 6 BSI 11-1999 Table 4 Summary of requirements for tube for structures Requirement Clause Product Inspection/Testing Method Standard Frequency Dimensions 5 All products See clause5 External defects 6 All products Visual See cl
43、ause6 Tensile test 7 All products Tensile test EN2002-1 2per batch a Batch uniformity 8 8 a) or All products Tensile test EN2002-1 more2 per batch bSee clause8 a) 8 b) Tubes of a diameterW 20 mm Hardness testing EN2002-7 See clause 8 b) Flattening test 9 If required by the material standard Flatteni
44、ng EN2002-10 1per batch Drift test 10 Circular tubes extruded by bridge die process Drifting EN2002-9 1per extruded length Coarse grain zone 11 As required by the order or inspection schedule Macrographic examination According to the capability clause or order or the inspection schedule Marking 13 A
45、ll products Visual See clause 13 a 2 test pieces from 2 different tubes including the lowest hardness tube where the batch uniformity procedure is as specified in clause8 b). b 2 test pieces from the two selected tubes for tensile test (clause 7) but sampled from ends not yet tested.BSEN2070-4:1991
46、BSI 11-1999 National appendix A The United Kingdom participation in the preparation of this European Standard was entrusted by the Aerospace Standards Policy Committee (ACE/-) to Technical Committee ACE/61 upon which the following bodies were represented: Aluminium Federation British Forging Industr
47、y Association British Investment Casting Trade Association British Steel Industry Copper Development Association Department of Trade (National Physical Laboratory) Light Metal Founders Association Ministry of Defence Society of British Aerospace Companies Limited National appendix B The British Stan
48、dards corresponding to the European Standards referred to in the text are identical in number and title with those given in clause2.BSEN 2070-4:1991 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards
49、. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions BritishStandards are updated by amendment or revision. Users of BritishStandards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this BritishStandard would inform the Secretary of the technical com
